What front differential in 06' 1/2 ton?

I just won an aution on ebay where I bought a set of 4.10 gears for my 2005 1500 4x4. The description said they were from a 2006 1500 4x4, but described the front diff. as a 10.25" instead of the 8.25" that I believe is in the 06' 1500's. Do you think the guy was just confused or am I wrong in thinking the 06 had the 8.25? I already bought it so there is not much I can do about it, but I got the pair (30,000 Miles) for $150, which I thought was a steal. Thoughts?

for a good locker, i would recommend the ECTED diff. by Auburn Gear. I don't have any experience with it, but am thinking of getting one. Once it is installed, it is full-time limited slip, and then you just flip a switch (while driving at any speed) and it sets it into fully locked mode. I don't know about price though. hope this helps.

If he miss-represented the gears you may want to contest it through PayPal. Also I know it's a little late but I hope you are buying new gears and not used ones. Never, never buy a used ring and pinion. It will cause nothing but grief and it will always be noisy.